If you want to delete all records from an OrientDB collection, the best way to do this is using the OrientDB TRUNCATE Class command. To use the Truncate command in a Java application, you can use the following code:
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ODatabaseDocumentTx db = new ODatabaseDocumentTx("remote:localhost/database").open("username", "password");
db.command(new OCommandSQL("TRUNCATE CLASS Asin")).execute();
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To use the equivalent of a Drop Column in OrientDB, you can use OrientDB’s DROP PROPERTY.
DROP PROPERTY <class>.<property> This however doesn’t remove the values, it only updates the schema, if you have one. To also remove the values, use the following command:
UPDATE <class> REMOVE <property> WHERE <condition> Hope that helps!
When using Gradle, it’s recommended to use the Gradle Wrapper. The wrapper allows you to easily distribute your projects to people who don’t have Gradle installed, and it makes sure your build is repeatable by not breaking when new versions of Gradle are released. To create a wrapper file, executing gradle wrapper is enough. Upgrade/downgrade […]
AsciiDoc is gaining more and more popularity compared to the competing markup languages like Markdown, yet one of the biggest complaints heard was that tooling support was inadequate. These days, however, support for AsciiDoc is available in popular editors like Atom, Sublime, Emacs, Vim, etc, and also in the most popular Java IDE, IntelliJ IDEA. […]
One of the best ways to get started with AsciiDoc is to use the Asciidoctor toolchain, and specifically the Gradle integration. Ironically, the documentation on how to do this is not always clear, so this blog is an attempt to make things a bit easier. To get started with AsciiDoc and Gradle, we’ll create a […]
More than two years ago, I wrote about the effort to revive Groovy in Action. Little did I know that it would take another 2 years of a huge combined effort to get the book out. Maybe not surprising for other authors, and it has been mentioned many times before, but yet; it was an […]
How to convert Markdown to AsciiDoc.
Only 4 days ago, the paper version (pBook) of Groovy in Action was released, and with the release of the electronic edition (PDF, epub and mobi), all the editions of Groovy in Action, Second Edition, are fully available! So, what’s exactly covered in the book? The book is divided into three parts. The first part […]
The Amsterdam Scala Days 2015 in the Beurs van Berlage.
A curated list of 58 resources with beautiful and free stock photos to use in your software projects.